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Finding the Fourth Proportional to 287,054, 430,684.68 and 90,062

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Solution

The fourth proportional to 287,054, 430,684.68 and 90,062 is: 135,125.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,054 : 430,684.68 = 90,062 : x
  2. Step 2: Convert to fraction form
    287,054/430,684.68 = 90,062/x
  3. Step 3: Cross multiply
    287,054x = 430,684.68 × 90,062
  4. Step 4: Simplify right side
    287,054x = 38,788,323,650.16
  5. Step 5: Solve for x
    x = 38,788,323,650.16/287,054
  6. Step 6: Final answer
    x = 135,125.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.